Letter opener



FIG. 1 is a top perspective view of a letter opener showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is an enlarged end elevational view as seen from the left of FIG. 1;

FIG. 4 is an enlarged end elevational view as seen from the right of FIG. 1; and,

FIG. 5 is an enlarged side elevational view, the undisclosed opposite side being a mirror image thereof. 

The ornamental design for a letter opener, as shown and described. 